hmm that's the only usable information i found on google:
Dublin 4
Dublin's middle class liberals are often described as
Dublin 4, referring to one of the city's wealthiest
postal districts, in which the studios of
Radio Telifís Éireann, the national broadcaster are located, as are a number of respected schools, colleges and a university. The modern campus of
University College Dublin is located on the boundary of Dublin 4 and Dublin 14. In actuality, the term
Dublin 4 or the abbreviated
D4 can refer to any middle class Dubliner from the
Northside or the
Southside or in many cases to simply an attitude that can be found anywhere in Ireland. Many politicians and political commentators live in Dublin 4, while Dublin 4 traditionally takes a strongly liberal stance in
referenda on issues like
abortion and
divorce. The area is also associated with a distinctive accent which can be pleasing to some and painful to others.
But the accent isn't described. I don't wanna cause you troublewith recording sth, maybe there is some actor whos quite known which i could check out. There was the movie, called intermission which takes palce in Dublin. There is Colin Ferrel and Colm Meaney who are from Dublin, but i dunnu whether they have this D4 accent. Maybe you know the movie?